Note: This is an archival copy of Security Sun Alert 240101 as previously published on http://sunsolve.sun.com.
Latest version of this security advisory is available from http://support.oracle.com
as Sun Alert 1019497.1.

A security vulnerability in the snoop(1M) network utility relating to
the display of SMB traffic may allow a remote user the ability to execute
arbitrary commands as the user "nobody" or possibly another local user.

Sun acknowledges with thanks, Gael Delalleau working with the iDefense VCP, for bringing these issues to
our attention.

In order for a system to be affected by this issue, a user must run the snoop(1M) utility
without using the "-o" option. The interpretation by snoop of a
maliciously crafted packet can trigger the issue and allow arbitrary
commands to be run as the user running snoop. This can happen whether or not
the packet is captured "live" from an interface or is already in a
snoop capture file and is being read via the "-i" flag.

When run as the user "root", the snoop utility changes the effective
user to "nobody", so in this case the commands will run as the user
"nobody" and not as the user "root". For all other users the commands
will run as that user.

3. Symptoms

There are no predictable symptoms that would indicate this issue has
been exploited to execute arbitrary code.

4. Workaround

There is no workaround that would allow the snoop(1M) command to be
used without risking exposure to this issue. To defend completely
against this issue, the snoop command should not be used until the patches listed in the Resolution section can be applied.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

Solaris 10 with patch 138083-01

Solaris 9 with patch 112915-05

Solaris 8 with patch 108964-11

OpenSolaris based upon builds snv_96 or later

x86 Platform

Solaris 10 with patch 138084-01

Solaris 9 with patch 114262-04

Solaris 8 with patch 108965-11

OpenSolaris based upon builds snv_96 or later

For more information
on Security Sun Alerts, see 1009886.1.

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